Carrier route record

F9FAR→DEN

Frontier Airlines · Fargo to Denver

Flights: 172
Period: September 2025 to August 2026
Share of route: 12%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.

Frontier on FAR to DEN lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 172 flights, with a median arrival 13 minutes early.

The US average over the same twelve months is 77.3%, so there is little to separate Frontier on FAR to DEN from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

79.1%

Arrivals under 15 minutes late, of 172 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

Whole route

72.6%

Every carrier on FAR to DEN, 1,413 flights

These figures cover 172 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Carrier by carrier

Frontier against every carrier on FAR to DEN

Frontier flew 172 of the 1,413 flights on FAR to DEN, about 12% of it. Its 79.1% on time is 7 points better than the route as a whole, which runs 72.6%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Frontier at 79.1% to SkyWest at 71.0%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on FAR to DEN
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlines (this page)thin sample	172	79.1%	53 min	0.00%	B+
United Airlinesthin sample	363	73.2%	76 min	0.28%	C+
SkyWest Airlines	878	71.0%	101 min	1.48%	C

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Departure window

When Frontier runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 172 flights.

There are not enough flights in each departure window to split Frontier's FAR to DEN record by time of day without the percentages moving on noise. The headline rate of 79.1% is the reliable figure here.

Across the year

Frontier on FAR to DEN through the year

Jul–Sep 202517 flights—
Oct–Dec 202546 flights73.9%
Jan–Mar 202629 flights—
Apr–Jun 202646 flights78.3%
Jul–Sep 202634 flights79.4%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 79.1% on time across 172 flights.

Quarter by quarter Frontier on FAR to DEN held fairly steady: 73.9% in Oct–Dec 2025, 78.3% in Apr–Jun 2026 and 79.4% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Monday is the strongest day at 86.4% on time and Friday the weakest at 81.4%, a spread of 5 points.

Arrival by arrival

How late Frontier on FAR to DEN runs when it is late

Frontier on FAR to DEN often beats the schedule: 81 of 172 completed flights, 47%, arrived 15 minutes or more early. The 36 late arrivals split 11 under half an hour, 15 between 30 and 60 minutes, and 10 an hour or more.

15+ min early81 flights47.1%
Within 15 min55 flights32.0%
15–29 min late11 flights6.4%
30–59 min late15 flights8.7%
1–2 hours late7 flights4.1%
2+ hours late3 flights1.7%

Scale runs 0% to 100%.

Share of 172 completed flights by arrival against schedule.

7 of 32 late departures made up the time and arrived on time, 22% of them. In the other direction, 11 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.

The worst days

Worst days for Frontier on FAR to DEN

The latest arrival of the period was on 1 June 2026, 3 hours 6 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of Frontier on FAR to DEN in the period
Date	Arrived late by	Largest filed cause
1 June 2026	3 hours 6 minutes	National Airspace System
15 May 2026	2 hours 51 minutes	Late-arriving aircraft
10 October 2025	2 hours 8 minutes	Late-arriving aircraft
20 October 2025	1 hour 50 minutes	Late-arriving aircraft
22 November 2025	1 hour 47 minutes	Late-arriving aircraft

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 56% of the 1,894 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
56%
National Airspace System
33%
Carrier
6%
Extreme weather
4%

56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,894 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 1,894 reported delay minutes.

33% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 630 minutes out of 1,894, against a national NAS share of 21%.

Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

5.8% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 55 minutes, which a normal layover absorbs.

The 627 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg is a different operation and performs like one: it runs 87.3% on time across 173 flights, 8 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.

One caution: this is a thin sample. 172 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Frontier on FAR to DEN

Put together: treat all of this as provisional. 172 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 79.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 172 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures